| 7304.59.80 | 45 | Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm: | | | | |
| 7304.90 | | Other: | | | | |
| 7304.90.10 | 00 | Having a wall thickness of 4 mm or more: | | | | |
| 7304.90.10 | 00 | Of iron or nonalloy steel | kg | Free | | 1% |
| 7304.90.30 | 00 | Of alloy steel | kg | Free | | 8.5% |
| 7304.90.50 | 00 | Having a wall thickness of less than 4 mm: | | | | |
| 7304.90.50 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7304.90.70 | 00 | Of alloy steel | kg | Free | | 35% |
| 7305 | | Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross sections, the external diameter of which exceeds 406.4 mm, of iron or steel: | | | | |
| 7305.11 | | Line pipe of a kind used for oil or gas pipelines: | | | | |
| 7305.11 | | Longitudinally submerged arc welded: | | | | |
| 7305.11.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.11.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.11.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7305.12 | | Other, longitudinally welded: | | | | |
| 7305.12.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.12.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.12.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7305.19 | | Other: | | | | |
| 7305.19.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.19.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.19.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7305.20 | | Casing of a kind used in drilling for oil or gas: | | | | |
| 7305.20.20 | 00 | Of iron or nonalloy steel: | | | | |
| 7305.20.20 | 00 | Threaded or coupled | kg | Free | | 20% |
Harmonized Tariff Schedule of the United States inquiry: 3203Ã
